Site-index Model for Abies chephalonica in the Mount Taygetos Forest in Greece
To develop a site-index system, stem analyses data were employed, portraying 70 dominant and codominant trees growing on even-aged Abies chephalonica stands in the Mount Taygetos forest in southern Greece. Two different models were considered for the development of site-index curves: King's height/age model using the parameter prediction method for fitting site-index curves and a difference equation model. The difference model performed better, in terms of the overall appearance of the final site-index curves, at a wide range of ages. Based on the results, it was decided to adopt a difference model for the development of a site-index system for A. chephalonica stands in the Mount Taygetos forest. Breast-height age and mean height of dominant and codominant trees are the entry attributes in the site-index system in order to have a site index (height at base age, Ao = 50 yrs) of a single tree or stand.